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“decrease in density”

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2000 ’10

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Taxon: tree species ✕

Taxon groups are the verbatim names found in the abstracts (case-insensitive), not normalised: maize, corn and Zea mays are separate groups here. The Organism view merges them through NCBI Taxonomy.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Tree density decreased as basal area increased.

Taxon: tree speciese1
Outcome: densitye0
Direction: decreasee0
Setting: increasing basal areae0

Verbatim

e0
“species diversity and density decrease with increasing basal area.”
✓ located verbatim in the source · abstract, characters 852–918

e1
“diversity of tree species”
✓ located verbatim in the source · abstract, characters 353–378

Title

Diversity and quantitative analysis of dominant tree species in district Chamba of Himachal Pradesh

K. Singh; R. Kaushal Indian Journal of Forestry 2006. doi:10.54207/bsmps1000-2006-ow7i5j

Other claims from this paper (9)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Species richness, diversity and seedling density fell in gap zones after creation.

Taxon: tree speciest0
Treatment: gap creatione0
Outcome: species richness and diversity and seedling densitye0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Before gap creation, species richness and diversity and seedling density were quite similar. After gap creation a sharp decrease could be verified in the gap.zones”
✓ located verbatim in the source · abstract, characters 843–1006

t0
“Regeneration of tree species in felling gaps”
✓ located verbatim in the source · abstract, characters 0–44

Title

Regeneration in felling gaps after logging in Acre state, Western Amazon.

M. V. N. d'. Oliveira; Michael Swaine; David F. R. P. Burslem Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) 2016

Other claims from this paper (12)

Observation Felling gaps averaged 340 m2.
Observation Canopy openings averaged 17%.
Observation Seedling mortality was 4.6% per year in undisturbed forest.
Observation Seedling mortality was 59.6% per year in crown zones two years after logging.
Observation Seedling mortality was 100% per year in trunk zones two years after logging.
Observation Seedling recruitment averaged 462 plants per hectare per year in undisturbed forest.
Observation Seedling recruitment averaged 1350 per hectare per year in crown zones.
Observation Seedling recruitment averaged 1392 per hectare per year in trunk zones.
Observation All seedlings in trunk zones after logging were new recruits.
Association Seedling growth tended to rise from 0,21cm per year in natural forest to 0.40cm per year in crown zones.
Observation Gap and undisturbed forest differences decreased rapidly in the second year.
Intervention effect Gap creation did not affect regeneration of commercial species except by increasing growth rates.

Associationobservedoriginal resultmeasured

Claim · model-written summary

high density of species decreases the probability of an NTFP tree absence in the buffer zone

Taxon: tree speciese0
Treatment: high density of speciese3
Outcome: probability of an NTFP tree absence in the buffer zonee3
Direction: decreasee3

Verbatim

e0
“We identified 249 tree species, of which 48% were classified as NTFP species”
✓ located verbatim in the source · abstract, characters 346–422

e3
“the high density of species, and collections of fruit, leaf, and resin decrease the probability of an NTFP tree absence in the buffer zone”
✓ located verbatim in the source · abstract, characters 751–889

Title

Impact of Non-Timber Forest Product Use on the Tree Community in North-Western Vietnam

Thi Hoa Hong Dao; Dirk Hölscher Forests 2018. doi:10.3390/f9070431

Other claims from this paper (5)

Observationobservedcited backgroundnegativemeasured

Claim · model-written summary

The cited study reported declining density and younger-individual proportions for several tree species.

Taxon: tree speciese0
Outcome: population densities and proportion of younger individualse0
Direction: decreasee0
Setting: Białowieża National Parke0

Verbatim

e0
“describe a decrease in population densities and proportion of younger individuals for several tree species in permanent research plots in the core zone of the Białowieża National Park”
✓ located verbatim in the source · abstract, characters 78–261

Title

Lack of demographic equilibrium indicates natural, large‐scale forest dynamics, not a problematic forest conservation policy – a reply to Brzeziecki et al.

Bogdan Jaroszewicz; Andrzej Bobiec; Amy Elizabeth Eycott Journal of Vegetation Science 2016. doi:10.1111/jvs.12458

Other claims from this paper (3)

Associationobservedoriginal resultmeasured

Claim · model-written summary

Tree species diversity decreased as basal area increased.

Taxon: tree speciese1
Outcome: species diversitye0
Direction: decreasee0
Setting: increasing basal areae0

Verbatim

e0
“species diversity and density decrease with increasing basal area.”
✓ located verbatim in the source · abstract, characters 852–918

e1
“diversity of tree species”
✓ located verbatim in the source · abstract, characters 353–378

Title

Diversity and quantitative analysis of dominant tree species in district Chamba of Himachal Pradesh

K. Singh; R. Kaushal Indian Journal of Forestry 2006. doi:10.54207/bsmps1000-2006-ow7i5j

Other claims from this paper (9)

Associationobservedoriginal resultmeasured

Claim · model-written summary

Stem density and basal area increased up to a certain diameter class and then decreased from the 15-24.99 cm class.

Taxon: tree speciest0
Outcome: stem density and basal areae6
Direction: decreasee6
Qualifier: continued to increase to a certain level of diameter classe6
Setting: south western human impact hillse0

Verbatim

t0
“Tree species diversity”
✓ located verbatim in the source · title, characters 0–22

e0
“Tree species diversity, species richness and phytosociological characters were investigated in the south western human impact hills at Chittagong University (CU) campus in Bangladesh”
✓ located verbatim in the source · abstract, characters 0–182

e6
“the study area is in mid-level succession where stem density and basal area continued to increase to a certain level of diameter class eventually decrease (from 15-24.99 cm diameter class)”
✓ located verbatim in the source · abstract, characters 1082–1270

Title

Tree species diversity in the south western human impact hills at Chittagong University campus in Bangladesh

Muhammad Saifullah; Abdullah Al 2014

Other claims from this paper (15)

Observation Thirty-three tree species belonging to 16 families were recorded in the study hills.
Observation Meliaceae was the dominant family with 4 species.
Observation Total stand density of the study area was 1037 stem ha-1.
Observation Total basal area of the study area was 41.124 m2 h-1.
Observation Gmelina arborea had the highest stand density, 222 stem ha-1.
Observation Gmelina arborea had a relative abundance of 6.57%.
Observation Albizia procera had the highest basal area, 8.217 m2 h-1.
Observation Albizia procera had a relative frequency of 13.92%.
Observation Albizia procera had a relative dominance of 19.98%.
Observation Anacardium occidentale had the least stand density, 2 stem ha-1.
Observation Anacardium occidentale had a basal area of 0.014 m2 h-1.
Observation Anacardium occidentale had a relative dominance of 0.03%.
Observation The study area is in mid-level succession.
Observation Tree diversity index of the study area was 2.73.
Observation Gmelina arborea had the highest tree diversity, 0.33 on the Shannon-Weiner index.

Associationobservedoriginal resultmeasured

Claim · model-written summary

collections of fruit, leaf and resin decrease the probability of an NTFP tree absence in the buffer zone

Taxon: tree speciese0
Treatment: collections of fruit, leaf, and resine3
Outcome: probability of an NTFP tree absence in the buffer zonee3
Direction: decreasee3

Verbatim

e0
“We identified 249 tree species, of which 48% were classified as NTFP species”
✓ located verbatim in the source · abstract, characters 346–422

e3
“the high density of species, and collections of fruit, leaf, and resin decrease the probability of an NTFP tree absence in the buffer zone”
✓ located verbatim in the source · abstract, characters 751–889

Title

Impact of Non-Timber Forest Product Use on the Tree Community in North-Western Vietnam

Thi Hoa Hong Dao; Dirk Hölscher Forests 2018. doi:10.3390/f9070431

Other claims from this paper (5)

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“decrease in density”

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